PPAPI: Make GLES2 calls resilient to bad/dead resources.

ppapi/proxy/ppb_graphics_3d_proxy.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PPAPI_PROXY_PPB_GRAPHICS_3D_PROXY_H_
 #define PPAPI_PROXY_PPB_GRAPHICS_3D_PROXY_H_
 
 #include <vector>
 
 #include "base/memory/shared_memory.h"
@@ skipping 30 matching lines @@
   virtual PP_Bool DestroyTransferBuffer(int32_t id) OVERRIDE;
   virtual PP_Bool GetTransferBuffer(int32_t id,
                                     int* shm_handle,
                                     uint32_t* shm_size) OVERRIDE;
   virtual gpu::CommandBuffer::State FlushSyncFast(
       int32_t put_offset,
       int32_t last_known_get) OVERRIDE;
   virtual uint32_t InsertSyncPoint() OVERRIDE;
 
  private:
-  class LockingCommandBuffer;
-
   // PPB_Graphics3D_Shared overrides.
   virtual gpu::CommandBuffer* GetCommandBuffer() OVERRIDE;
   virtual int32 DoSwapBuffers() OVERRIDE;
-  virtual void PushAlreadyLocked() OVERRIDE;
-  virtual void PopAlreadyLocked() OVERRIDE;
 
-  int num_already_locked_calls_;
   scoped_ptr<gpu::CommandBuffer> command_buffer_;
-  scoped_ptr<LockingCommandBuffer> locking_command_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(Graphics3D);
 };
 
 class PPB_Graphics3D_Proxy : public InterfaceProxy {
  public:
   PPB_Graphics3D_Proxy(Dispatcher* dispatcher);
   virtual ~PPB_Graphics3D_Proxy();
 
   static PP_Resource CreateProxyResource(
@@ skipping 43 matching lines @@
   ProxyCompletionCallbackFactory<PPB_Graphics3D_Proxy> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_Graphics3D_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PPB_GRAPHICS_3D_PROXY_H_